diff options
| author | Robert Baldyga <r.baldyga@samsung.com> | 2015-07-28 07:19:59 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-07-30 11:43:35 -0500 |
| commit | 02ded1b0d8e73dad7d2626c960ef20fb7dc30753 (patch) | |
| tree | 7353424bd547ab0c43cc92312939a5edffde4ff6 | |
| parent | ffd9a0fcbbed300b55f84e8397e96c2edd06cbdf (diff) | |
| download | op-kernel-dev-02ded1b0d8e73dad7d2626c960ef20fb7dc30753.zip op-kernel-dev-02ded1b0d8e73dad7d2626c960ef20fb7dc30753.tar.gz | |
usb: gadget: add 'quirk_stall_not_supp' to usb_gadget
Due to some UDC controllers may not support stalling, usb gadget layer
needs to provide a generic way to inform gadget functions about non-standard
hardware limitations.
This patch adds 'quirk_stall_not_supp' field to struct usb_gadget and helper
function gadget_is_stall_supported(). It also sets 'quirk_stall_not_supp'
to 1 in at91_udc driver, which has such limitation.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
| -rw-r--r-- | drivers/usb/gadget/udc/at91_udc.c | 1 | ||||
| -rw-r--r-- | include/linux/usb/gadget.h | 10 |
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/at91_udc.c b/drivers/usb/gadget/udc/at91_udc.c index fc42264..32f50a79 100644 --- a/drivers/usb/gadget/udc/at91_udc.c +++ b/drivers/usb/gadget/udc/at91_udc.c @@ -825,6 +825,7 @@ static void udc_reinit(struct at91_udc *udc) INIT_LIST_HEAD(&udc->gadget.ep_list); INIT_LIST_HEAD(&udc->gadget.ep0->ep_list); + udc->gadget.quirk_stall_not_supp = 1; for (i = 0; i < NUM_ENDPOINTS; i++) { struct at91_ep *ep = &udc->ep[i]; diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 31be84b..f195a76 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -573,6 +573,7 @@ struct usb_gadget { unsigned a_alt_hnp_support:1; unsigned quirk_ep_out_aligned_size:1; unsigned quirk_altset_not_supp:1; + unsigned quirk_stall_not_supp:1; unsigned is_selfpowered:1; unsigned deactivated:1; unsigned connected:1; @@ -621,6 +622,15 @@ static inline int gadget_is_altset_supported(struct usb_gadget *g) } /** + * gadget_is_stall_supported - return true iff the hardware supports stalling + * @g: controller to check for quirk + */ +static inline int gadget_is_stall_supported(struct usb_gadget *g) +{ + return !g->quirk_stall_not_supp; +} + +/** * gadget_is_dualspeed - return true iff the hardware handles high speed * @g: controller that might support both high and full speeds */ |
